CN103309383A - Three terminal voltage regulator circuit for power supply - Google Patents
Three terminal voltage regulator circuit for power supply Download PDFInfo
- Publication number
- CN103309383A CN103309383A CN201210069302.5A CN201210069302A CN103309383A CN 103309383 A CN103309383 A CN 103309383A CN 201210069302 A CN201210069302 A CN 201210069302A CN 103309383 A CN103309383 A CN 103309383A
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- China
- Prior art keywords
- voltage
- power supply
- circuit
- terminal regulator
- terminal
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- 238000007600 charging Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 238000007599 discharging Methods 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/563—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices including two stages of regulation at least one of which is output level responsive, e.g. coarse and fine regulation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The invention relates to a three terminal voltage regulator circuit for a power supply, which comprises a three terminal voltage regulator, a power supply voltage input end, a power supply voltage output end, a voltage regulating circuit and a charging/discharging circuit. An input end of the voltage regulating circuit is connected with the power supply voltage input end; a first output end of the voltage regulating circuit is connected with the three terminal voltage regulator; a second output end of the voltage regulating circuit and the charging/discharging circuit as well as the three terminal voltage regulator are connected to the power supply voltage output end together. When the power supply is switched in, a power supply current flows through the voltage regulating circuit and the three terminal voltage regulator to charge the charging/discharging circuit; the three terminal voltage regulator detects a voltage of the charging/discharging circuit; when the voltage value of the charging/discharging circuit reaches a preset voltage value, the three terminal voltage regulator is switched off and the voltage regulating circuit and the charging/discharging circuit supply power to electronic equipment together. After the three terminal voltage regulator circuit is utilized, the three terminal voltage regulator is controlled to be switched on and off by the voltage of the charging/discharging circuit so as to control the power supply to supply power to the electronic equipment, and thus, the conversion efficiency of the power supply is improved.
Description
Technical field
The present invention relates to voltage regulator circuit, relate in particular to a kind of power supply three terminal regulator circuit that improves the power supply output efficiency.
Background technology
The power supply three terminal regulator is electronic circuit voltage conversion device commonly used, it can be transformed into dc high voltage less than input voltage to the reference voltage of Vref(power supply three terminal regulator) any voltage, thereby will unnecessary voltage (difference of input voltage value and output voltage values) consumption at self and with the form dissipation of heat energy.
The raising of the requirement of and small and exquisite exquisiteness energy-conservation to electronic product along with people, portable type electronic product requires comparatively strict to the temperature rise of shell.See also Fig. 1, schematic diagram for existing power supply three terminal regulator circuit, this power supply three terminal regulator circuit 10 comprises an integrated three-terminal regulator 11, the input end Vin of this integrated three-terminal regulator 11 is connected with power supply, the first output end vo ut1 and the second output end vo ut2 interconnect to form power output end, provide electric energy to load, port Gnd ground connection.This integrated three-terminal regulator 11 can be changed the supply voltage process of input the voltage with the output particular value, for example, when input voltage is 12V, the specific voltage value of changing and exporting by this integrated three-terminal regulator 11 is 3.3V, its supply voltage conversion efficiency is P=Vout/Vin=3.3V/12V=27.5%, and other supply voltages all distribute with the heat energy form.Be that 0.5A is example with the output current, the power of dissipation heat energy is Pd=(Vin-Vout) * Iout=(12V-3.3V) * 0.5A=4.35 W, and the power of the predetermined dissipation heat energy of this integrated three-terminal regulator U1 only is 0.5W.Therefore, existing power supply three terminal regulator circuit obviously can not satisfy the requirement to the shell temperature rise, and too much thermal dissipation also can be wasted resource.
Summary of the invention
In view of this, be necessary to provide a kind of power supply three terminal regulator circuit, it is lower to solve the three terminal regulator circuit energy conversion efficiency that exists in the prior art, the shortcoming that thermal dissipation is big.
The invention provides a kind of power supply three terminal regulator circuit, be arranged at a power supply, be used to the power electronic equipment that is connected with this power supply three terminal regulator circuit.This power supply three terminal regulator circuit comprises a three terminal regulator, is used for connecting the supply voltage input end and the supply voltage output terminal that is used for being connected electronic equipment of power supply.This power supply three terminal regulator circuit also comprises voltage regulator circuit and charge/discharge circuit, wherein, this three terminal regulator comprises input port and output port, first end of this voltage regulator circuit is connected with this supply voltage input end, second end is connected with the input port of this three terminal regulator, and the output port of this charge/discharge circuit, this three terminal regulator and the 3rd end of this voltage regulator circuit are connected to this supply voltage output terminal jointly; When this power supply three terminal regulator circuit inserts power supply, flow through this voltage regulator circuit and three terminal regulator of this source current is this charge/discharge circuit charging, this three terminal regulator is detected the voltage of this charge/discharge circuit by this output port, and when reaching a predeterminated voltage value, the voltage of this charge/discharge circuit closes this input port, this voltage regulator circuit is regulated this supply voltage, and with this charge/discharge circuit be this power electronic equipment jointly.
With respect to prior art, power supply three terminal regulator circuit provided by the invention, between three terminal regulator and supply voltage input end, increase by a voltage regulator circuit, connect a charge/discharge circuit at the supply voltage output terminal, when reaching the predeterminated voltage value, the voltage that detects the charge/discharge circuit when this three terminal regulator closes this three terminal regulator, make power supply pass through the conversion of voltage regulator circuit, and the power electronic equipment that is connected to the supply voltage output terminal jointly with the charge/discharge circuit, thereby improve the power supply conversion efficiency of this power supply three terminal regulator circuit.
Description of drawings
Fig. 1 is the circuit diagram of power supply three terminal regulator circuit of the prior art.
Fig. 2 is the functional block diagram of the power supply three terminal regulator circuit in an embodiment of the present invention.
Fig. 3 is the circuit diagram of the power supply three terminal regulator circuit in an embodiment of the present invention.
The main element symbol description
| Power supply three |
10、20 |
| Three |
11、23 |
| The supply |
21 |
| The supply |
22 |
| |
24 |
| |
240 |
| |
241 |
| The |
242 |
| The 4th end | 243 |
| The charge/ |
25 |
Following embodiment will further specify the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Please be simultaneously referring to Fig. 2,3, this power supply three terminal regulator circuit 20 can be applicable to a power-supply device, is used to the power supply of electronic equipment (not shown).This power supply three terminal regulator circuit 20 comprises supply voltage input end 21, supply voltage output terminal 22, three terminal regulator 23, voltage regulator circuit 24 and charge/discharge circuit 25.Wherein, three terminal regulator 23 comprises input port IN and output port OUT, first end 240 of voltage regulator circuit 24 is connected with supply voltage input end 21, second end 241 is connected with the input port IN of three terminal regulator 23, the 3rd end 242 is connected with supply voltage output terminal 22, the 4th end 243 ground connection.Charge/discharge circuit 25 is connected to supply voltage output terminal 22 jointly with the output port OUT of three terminal regulator 23.
In the present embodiment, this three terminal regulator 23 is an integrated IC, can detect the magnitude of voltage of output port OUT, it is the magnitude of voltage of supply voltage output terminal 22, and according to the open and close of this magnitude of voltage control input end mouth IN that detects, that is, mouth IN in control input end receives or stops to receive the power supply signal of voltage regulator circuit 24 outputs.Particularly, when the magnitude of voltage that detects supply voltage output terminal 22 is lower than a predeterminated voltage value, the input port IN of this three terminal regulator 23 is in opening, when the magnitude of voltage that detects supply voltage output terminal 22 reaches, during namely more than or equal to this predeterminated voltage value, the input port IN of this three terminal regulator 23 is in closed condition.In the present embodiment, this predeterminated voltage value is the fixedly output voltage values of this three terminal regulator 23, and its occurrence is 3.3V.
In the present embodiment, this voltage regulator circuit 24 comprises a transformer T and a diode D1, wherein, the primary coil T1 of this transformer T is connected between the input port IN of supply voltage input end 21 and three terminal regulator 23, first end of secondary coil T2 is connected with supply voltage output terminal 22, the diode D1 ground connection of second end by oppositely connecting.This charge/discharge circuit 25 comprises a capacitor C 2, and first end of this capacitor C 2 is connected with supply voltage output terminal 22, the second end ground connection.
The general work principle of power supply three terminal regulator circuit 20 of the present invention is: when this supply voltage input end 21 accesses one power supply (not shown) is powered for an electronic equipment (not shown) that is connected with supply voltage output terminal 22, the magnitude of voltage of supply voltage input end 21 is and inserts the power source voltage value, magnitude of voltage moment of supply voltage output terminal 22 is zero, thereby the output port OUT of this three terminal regulator 23 is connected voltage to be similarly zero and to be lower than this predeterminated voltage value with supply voltage output terminal 22, thereby the input port IN of this three terminal regulator 23 is in opening.At this moment, when source current is flowed through voltage regulator circuit 24, the primary coil T1 that continues driver transformer T owing to source current produces electromagnetic induction, the part current conversion is the relevant voltage that secondary coil T2 produces, capacitor C 2 chargings of three terminal regulator 23 backs for charge/discharge circuit 25 of flowing through of part electric current.
Charging along with the capacitor C 2 of charge/discharge circuit 25, the magnitude of voltage of supply voltage output terminal 22 raises gradually, when the magnitude of voltage of supply voltage output terminal 22 reaches this predeterminated voltage value, the input port IN of this three terminal regulator 23 switches to closed condition, whole electric currents that power supply provides are used for continuing excitation primary coil T1 makes secondary coil T2 generation have relevant voltage, and common for being connected the power electronic equipment of supply voltage output terminal 22 with charge/discharge circuit 25.
Be 12 to be example with the input supply voltage value, the predeterminated voltage value is 3.3V, therefore, supply voltage conversion efficiency P '=(Vout1+Vout2)/Vin=(Vout1+Vout2)/12, wherein, Vout1 is the magnitude of voltage that transformer T produces at secondary coil T2, the magnitude of voltage that Vout2 provides for charge/discharge circuit 25, i.e. 3.3V.And former supply voltage conversion efficiency P=Vout/Vin, obviously, P ' is greater than P for the supply voltage conversion efficiency.Be that 0.5A is example with the source current, calculate on this basis the power P d ' of dissipation heat energy=(12V*P '-3.3V) * 0.5A, and former dissipation heat energy power P d=(12V-3.3V) * 0.5A is obvious, d ' is less than Pd for dissipation heat energy power P.
When capacitor C 2 discharges of charge/discharge circuit 25 are power electronic equipment, continuous discharge along with capacitor C 2, the magnitude of voltage of supply voltage output terminal 22 reduces gradually, when the magnitude of voltage of supply voltage output terminal 22 is lower than this predeterminated voltage value, the input port IN of this three terminal regulator 23 opens again, as mentioned above, source current capacitor C 2 chargings of transformer T and three terminal regulator 23 for charge/discharge circuit 25 of flowing through again, discharging again when satisfying predeterminated voltage is power electronic equipment, does not add at this and gives unnecessary details.
So cycle control, power supply is power electronic equipment by voltage regulator circuit 24 with charge/discharge circuit 25.
Use above-mentioned power supply three terminal regulator circuit, between three terminal regulator and supply voltage input end, increase by a voltage regulator circuit, connect a charge/discharge circuit at the supply voltage output terminal, when reaching the predeterminated voltage value, the voltage that detects the charge/discharge circuit when this three terminal regulator closes this three terminal regulator, make power supply pass through the conversion of voltage regulator circuit, and the power electronic equipment that is connected to the supply voltage output terminal jointly with the charge/discharge circuit, thereby improve the power supply conversion efficiency of this power supply three terminal regulator circuit.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.
Claims (5)
1. power supply three terminal regulator circuit, be arranged at a power supply, be used to the power electronic equipment that is connected with described power supply three terminal regulator circuit, described power supply three terminal regulator circuit comprises a three terminal regulator, be used for connecting the supply voltage input end and the supply voltage output terminal that is used for being connected electronic equipment of power supply, it is characterized in that, described power supply three terminal regulator circuit also comprises voltage regulator circuit and charge/discharge circuit, wherein, described three terminal regulator comprises input port and output port, first end of described voltage regulator circuit is connected with described supply voltage input end, second end is connected with the input port of described three terminal regulator, described charge/discharge circuit, the 3rd end of the output port of described three terminal regulator and described voltage regulator circuit is connected to described supply voltage output terminal jointly; When described power supply three terminal regulator circuit inserts power supply, flow through described voltage regulator circuit and three terminal regulator of described source current is described charge/discharge circuit charging, described three terminal regulator is detected the voltage of described charge/discharge circuit by described output port, and when reaching a predeterminated voltage value, the voltage of described charge/discharge circuit closes described input port, described voltage regulator circuit is regulated described supply voltage, and with described charge/discharge circuit be described power electronic equipment jointly.
2. power supply three terminal regulator circuit as claimed in claim 1, it is characterized in that, when described voltage regulator circuit and described charge/discharge circuit are described power electronic equipment jointly, and when the voltage of described charge/discharge circuit is lower than described predeterminated voltage value, described three terminal regulator is opened described input port, and flow through described voltage regulator circuit and three terminal regulator of described source current is described charge/discharge circuit charging again.
3. power supply three terminal regulator circuit as claimed in claim 1 is characterized in that, described predeterminated voltage value is the fixedly output voltage values of described three terminal regulator.
4. power supply three terminal regulator circuit as claimed in claim 1, it is characterized in that, described voltage regulator circuit comprises transformer and diode, the primary coil of described transformer is connected between the input port of described power supply power input and described three terminal regulator, first end of the secondary coil of described transformer is connected with described supply voltage output terminal, and second end is by the diode ground connection of described reverse connection.
5. power supply three terminal regulator circuit as claimed in claim 1 is characterized in that, described charge/discharge circuit comprises an electric capacity, and first end of described electric capacity is connected with described supply voltage output terminal, the second end ground connection.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069302.5A CN103309383A (en) | 2012-03-16 | 2012-03-16 | Three terminal voltage regulator circuit for power supply |
| TW101109596A TW201339782A (en) | 2012-03-16 | 2012-03-21 | Power supply circuit having three terminal regulator |
| US13/437,021 US20130241517A1 (en) | 2012-03-16 | 2012-04-02 | Power circuit having three-terminal regulator |
| EP12165417.2A EP2639667A2 (en) | 2012-03-16 | 2012-04-24 | Power Circuit Having Three-terminal Regulator |
| JP2013051546A JP2013198401A (en) | 2012-03-16 | 2013-03-14 | Power circuit having three-terminal regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069302.5A CN103309383A (en) | 2012-03-16 | 2012-03-16 | Three terminal voltage regulator circuit for power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103309383A true CN103309383A (en) | 2013-09-18 |
Family
ID=46085393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210069302.5A Pending CN103309383A (en) | 2012-03-16 | 2012-03-16 | Three terminal voltage regulator circuit for power supply |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20130241517A1 (en) |
| EP (1) | EP2639667A2 (en) |
| JP (1) | JP2013198401A (en) |
| CN (1) | CN103309383A (en) |
| TW (1) | TW201339782A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2706740B2 (en) * | 1990-05-16 | 1998-01-28 | セイコーインスツルメンツ株式会社 | Voltage regulator |
| JPH08147076A (en) * | 1994-11-22 | 1996-06-07 | Seiko Epson Corp | Information processor |
| US5847552A (en) * | 1995-01-24 | 1998-12-08 | Dell Usa, L.P. | Integrated circuit with determinate power source control |
| US6653789B2 (en) * | 2001-03-26 | 2003-11-25 | Truck-Lite Co., Inc. | Multiregulator circuit and lamp |
| US7948078B2 (en) * | 2006-07-25 | 2011-05-24 | Rohm Co., Ltd. | Semiconductor device |
| TW201205221A (en) * | 2010-07-23 | 2012-02-01 | Hon Hai Prec Ind Co Ltd | Voltage-stabilizing circuit |
-
2012
- 2012-03-16 CN CN201210069302.5A patent/CN103309383A/en active Pending
- 2012-03-21 TW TW101109596A patent/TW201339782A/en unknown
- 2012-04-02 US US13/437,021 patent/US20130241517A1/en not_active Abandoned
- 2012-04-24 EP EP12165417.2A patent/EP2639667A2/en not_active Withdrawn
-
2013
- 2013-03-14 JP JP2013051546A patent/JP2013198401A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20130241517A1 (en) | 2013-09-19 |
| TW201339782A (en) | 2013-10-01 |
| JP2013198401A (en) | 2013-09-30 |
| EP2639667A2 (en) | 2013-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130918 |